What is prime?
Load project context before implementing features or making architectural decisions. Invoke proactively at the start of significant work on any project. Scans CLAUDE.md, README, goals/, specs/, docs/, and source structure to build a context summary. Supports optional domain hints to focus on specific areas of the codebase. Use when you need project conventions, architecture understanding, or domain context before coding. Source: slamb2k/mad-skills.